GOD'S WORD® Translation
This happened so that the LORD's words spoken through Jeremiah would be fulfilled. The land had its years of rest and was made acceptable [again]. While it lay in ruins, [the land had its] 70 years of rest.

American Standard Version
to fulfil the word of Jehovah by the mouth of Jeremiah, until the land had enjoyed its sabbaths: for as long as it lay desolate it kept sabbath, to fulfil threescore and ten years.

Berean Study Bible
So the land enjoyed its Sabbath rest all the days of the desolation, until seventy years were completed, in fulfillment of the word of the LORD through Jeremiah.

Douay-Rheims Bible
That the word of the Lord by the mouth of Jeremias might be fulfilled, and the land might keep her sabbaths: for all the days of the desolation she kept a sabbath, till the seventy years were expired.

English Revised Version
to fulfill the word of the LORD by the mouth of Jeremiah, until the land had enjoyed her sabbaths for as long as she lay desolate she kept sabbath, to fulfill threescore and ten years.

King James Bible
To fulfil the word of the LORD by the mouth of Jeremiah, until the land had enjoyed her sabbaths: for as long as she lay desolate she kept sabbath, to fulfil threescore and ten years.

World English Bible
to fulfill the word of Yahweh by the mouth of Jeremiah, until the land had enjoyed its Sabbaths: [for] as long as it lay desolate it kept Sabbath, to fulfill seventy years.

Young's Literal Translation
to fulfil the word of Jehovah in the mouth of Jeremiah, till the land hath enjoyed its sabbaths; all the days of the desolation it kept sabbath -- to the fulness of seventy years.

2 Chronicles 36:21 Additional Translations ...